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Advances in Partial Oxidation of Palm Oil Based Biodiesel Reforming to Hydrogen Production for Diesel Engine Applications

KMUTNB-Kampanart Theinnoi, Boonlue Sawatmongkhon, Warirat Temwutthikun, Thawatchai Wongchang
  • Technical Paper
  • 2019-01-1412
To be published on 2019-03-25 by SAE International in United States
The aims of this research is investigate the hydrogen production via biodiesel fuel partial oxidation reforming. Hydrogen production can enhance combustion in cylinder and improved aftertreatment activities. A reforming reaction is when a chemical reacts with oxygen available in exhaust gas and diesel fuel injection. The 2%Pt-1%Rh-CeO2-ZrO2/γ-Al2O3 was selected as the active catalyst in this research. This study investigates the effect of gas space velocity (SV) (e.g., 10k h-1 and 16k h-1) and fuel addition flow rate (10-30 ml/h) on hydrogen production efficiency. As can be seen that the hydrogen from reforming reaction was promoted under the real engine operating conditions. Hydrogen is produced via partial oxidation of hydrocarbons reforming. The effects of space velocity SV (h−1) and hydrocarbon addition, which enhanced energy input for the reforming process, are the main effect on hydrogen production over the reforming catalyst. The maximum hydrogen yield are achieved 11%. In the future, hydrogen production via partial oxidation fuel reforming could be developed for production of hydrogen on-board the vehicle.
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A Study of the Half Order Modulation Control for Diesel Combustion Noise by Using Model Based Controller Design

Hyundai Motor Company-Ki Hwa Lee, Choonggeun Nam, O Jun Kwon, Jung-Hwan Moon
Siemens Industry Software SAS-Pascal Giansetti
  • Technical Paper
  • 2019-01-1416
To be published on 2019-03-25 by SAE International in United States
This model based investigation is carried out in order to control the half order modulation for diesel engines using by virtual calibration approach and proposes a feedback control strategy to mitigate cylinder to cylinder imbalance from asymmetric cylinders torque production. Combustion heat release analysis is performed on test data to understand the root cause of observed cylinder to cylinder pressure variations. The injected fuel variations are shown to cause the observed pressure variations between cylinders. A feedback control strategy based on measured crank shaft position is devised to control the half order modulation to balance the combustion pressure profile between cylinders. This control strategy is implemented in Simulink and is tested in closed-loop with the diesel engine model in AMESim. The closed-loop performance indicates that the half order modulation is considerably improved while having minimal impact on the fuel consumption.
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Target Setting for the Stiffness of Local Mounting Area in the Vehicle Body for NVH and R&H

Hyundai Motor Company-Yongdae Kim, Ju Young Lee
  • Technical Paper
  • 2019-01-1418
To be published on 2019-03-25 by SAE International in United States
Performance criterion of local stiffness in BIW(Body in White) for NVH(Noise, Vibration, and Harshness) and R&H (Ride and Handling) are presented in this study. A process to develop the local stiffness of the vehicle body has been established for the performances. For handling performance, not only suspension bush stiffness but local stiffness in BIW structure is important. However, there is no good standard to describe handling performance using BIW local stiffness. In this paper, a new evaluation standard for local stiffness in BIW is developed and verified considering actual vehicle driving condition for handling performance. Also, new evaluation process regarding local stiffness in BIW for vibration transmissibility is presented. The new process is developed considering optimal relation between connecting bush stiffness and BIW local stiffness. It is shown that the interior noise of the vehicle is reduced by applying the evaluation process, which is verified through several cases.
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Structural Optimization of an Vehicle Seat Cushion Bolster Wrinkle Improvement

Hyundai Dymos Seat R&D Center-Tehchiang Wang
  • Technical Paper
  • 2019-01-1420
To be published on 2019-03-25 by SAE International in United States
In recent years, a problem about car seat covering wrinkles rate are gradually increasing. So think that first have to understand the principle of how the wrinkles are occurred at vehicle seat. In this research, the focus is seat cushion bolster wrinkles. For understand about cushion bolster wrinkles, so set the three goals as below. (1) Understand the wrinkle’s occurred mechanism. (2) Suggest a design solution for cushion bolster wrinkle by using DFSS1 analysis. (3) Optimize the solution to robust the wrinkle performance.
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Release Bearing Characteristic of Diaphragm Spring under Dynamical Condition

Bursa Teknik Universitesi-Huseyin Lekesiz
Bursa Uludag University-Ali Yildiz
  • Technical Paper
  • 2019-01-1424
To be published on 2019-03-25 by SAE International in United States
Diaphragm spring design has a critical importance on engagement and disengagement mechanism for a clutch system. The release bearing load characteristic of diaphragm springs determines the quality of disengagement. Release bearing load may change significantly especially under dynamic conditions compared to static conditions. For instance, a significant drop in release bearing load may be experienced under high engine velocities. This is an undesirable situation in terms of clutch performance. Drop in release bearing load may cause not to be transmitting reliably torque from engine to gearbox since minimum release bearing load is not ensured. Drop in release bearing load increases incrementally in proportion to the engine speed increase. This problem has not been addressed in technical literature. Therefore, new design of diaphragm spring becomes necessary to avoid weakening of clutch performance as the engine speed increases which leads to highly dynamic conditions. In this study, the effect of some design parameters for diaphragm springs such as outer radius and embossing are investigated using nonlinear finite element modeling. Three different outer radius with and without embossing…
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Development of Compensation Logic for EPS in Limit Cornering Condition

Hyundai & Kia Corporation-Hanseung Lee, Jae Kil Lee
  • Technical Paper
  • 2019-01-1422
To be published on 2019-03-25 by SAE International in United States
This paper proposes steering compensation logic of Electric Power Steering (EPS) system in limit cornering condition. Steering wheel torque is decided by relationships between internal forces and external forces. The internal forces are steering frictions and assist force. The external forces are transferred from tire forces through kingpin axis and steering system. Kingpin moments are analyzed by using vector analysis and tire model. Relations of these forces are defined and used to explain steering disturbance by comparing simulation results and measurement data. Using these relationships, the proposed compensation logic is designed. This logic is verified by simulation models and validated in proto type vehicle.
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Prediction and Validation of Unknown GISSMO Properties Using by Regression Analysis of Experimental Damage Tests

Hyundai Dymos Seat R&D Center-Tae Hwan Jun
  • Technical Paper
  • 2019-01-1426
To be published on 2019-03-25 by SAE International in United States
A seat, as one of the main automobile components is closely related to the passenger safety. It plays an important role on a protection of passengers from a sudden movement of a car and external front/rear/side crash. In order to achieve these purposes, strength, rigidity and durability of a seat have to be satisfied which are regulated by the law. Therefore, a prediction of the fracture time and the behavior of the seat structure by Finite Element analysis are very important. However, the fracture prediction method from axial tensile strength test has limits to present the behavior which is obtained in multiple loading cases. For this reason, a new analysis method for the fracture prediction considering multiple loading cases has to be established.In this research, the phenomenon of a seat fracture is implemented and the simulation is performed to predict the behavior using GISSMO Damage model in LS-DYNA. In order to find a fracture strain in a diverse stress mode, deformation tests of shear into a multiple direction, bi-axial tensile tests, notch impact test and…
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Development of an Engine-Vehicle Simulation Model for Prediction of Transient Performance

Indian Institute of Technology Madras-Tom Johny, Jensen Samuel, A Ramesh
  • Technical Paper
  • 2019-01-1428
To be published on 2019-03-25 by SAE International in United States
Transient engine/vehicle operation is challenged by off-design operating conditions. Consequently, it results in non-optimum performance and emissions. Experimentation on a vehicle under transient conditions is complex and hence robust computer models can be used for such studies. In this work, a transient engine simulation model was developed using commercial software called AVL Cruise. The model was validated using transient experiments from the engine test-bed. The reference engine’s ECU logic and control map values were used in the engine model. The fuel consumption, torque response, IMEP, turbocharger operating conditions and smoke emissions could be predicted fairly well under steady and transient conditions. Another flexible MATLAB model of the vehicle was also developed in order to provide the required inputs for the transient engine simulation code such as load torque, engine speed and gear ratios once the vehicle speed and road terrain were known. The coupled engine-vehicle models were able to predict the fuel consumption rate, emissions and also the influences of gear changes and drive ratio changes of the transmission. It was observed that smoke spikes…
 

Future strategy of the automotive industry in Thailand

Chulalongkorn University-Chatchanee Pakavatsoontorn
  • Technical Paper
  • 2019-01-1395
To be published on 2019-03-25 by SAE International in United States
Today the environmental effect, specifically a negative one, of the car is being studied extensively. In marketing terms, being environmentally friendly might have some positive effects to some extent on the brand reputation. This work investigates to what extent different factors affect the brand reputation among Thai car consumers. In order to do this, the quantitative research approach, based on an empirical study, has been adopted in positivism with a deductive approach to analyzing the gathered data. It is found that the environmental influential factor affects car design especially alternative car design in Thailand. The strategy for further growth of the automobile industry in Thailand, on the other hand, was shown to strongly affect environmental brand reputation. This might arise from the fact that Thailand’s automotive industry growth is by law, which has nothing to do with eco-friendliness. At this point, it is not good to discard the regulations as this can lead to even better automotive design and alternative power source to traditional petroleum or alternative fuel vehicles such as hybrid or eclectic, fuel…
 

Aerodynamic Design Optimization in Rear End of a Hatchback Passenger Vehicle

Maruti Suzuki India, Ltd.-Devesh Bajpai, Felix Regin
  • Technical Paper
  • 2019-01-1430
To be published on 2019-03-25 by SAE International in United States
Aerodynamic evaluation plays an important role in the new vehicle development process to meet the ever increasing demand of Fuel Economy (FE), superior aero acoustics and thermal performance. Computational Fluid Dynamics (CFD) is extensively used to evaluate the performance of the vehicle at early design stage to overcome cost of proto-parts, late design changes and for time line adherence.CFD is extensively used to optimize the vehicle’s shape, profiles and design features starting from the concept stage to improve the vehicle’s aerodynamic performance. Since the shape of the vehicle determines the flow behavior around it, the performance is different for hatchback, notchback and SUV type of vehicles. In a hatchback vehicle, the roof line is abruptly truncated at the end, which causes flow separation and increase in drag.In this paper, the effect of shape of a hatchback vehicle at the rear end is studied along with drag reduction features like roof end extension, edges on c-pillar, rear combination lamp and rear bumper. Response surface method (RSM) is used to explore the sensitivity of various design parameters.…
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